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Intermittent blower operation on Goodman AC/heat pump-outside unit comes on -sometimes blower does-sometimes not-can switch Tstat off then on and blower will operate

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I believe this to be either a bad, miswired, or loose connections on the thermostat or thermostat wires. If this is not the problem then a bad circuit board is probably your issue. A licensed technician can use a amp meter and multi meter to trace this problem. Good Luck.

Posted on Jun 25, 2008


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Coleman Evcon furnace blower runs w/ no call for heat. Temp is 5+ degrees above thermostat setting. (Programmable tstat)

When you say door are you referring to the front door or the furnace door? If the unit kicks on AND off by itself I would say it's in the tstat or the tstat wire. If it were internal I would think the blower relay or heat contactor/relay were getting stuck AND THE FAN WOULD NOT TURN OFF until you flipped the breaker. Good luck

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the w wire off thermosta controls heat. eithe bad board or thermostat.

Feb 01, 2013 | Goodman Heating & Cooling

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Replaced Thermostat and now Blower Motor will not run

Sounds like a set up issue on the tstat. You say this is a packaged unit, inside the machine you should find where the tstat wires hook up. Typically red is power yellow is compressor orange is reversing valve white is emergency heat green is blower. Put red and green together, test blower. Then red green and yellow, make sure blower works again. If blower runs both ways it's either the tstat wire or tstat itself. Make sure you are landing wires on dedicated heat pump terminals, make sure in settings you are set up for heat pump with back up electric heat and TSTAT CONTROLS THE FAN. Good Luck. Also if there is a switch on the tstat for gas or electric on the back you want electric.

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I just turned on our heat unit "FA4A AC/Heat Pump"

There probably isn't a reset button=magic fix. With it in heat pump mode and tstat set above indoor temp, check your outdoor unit to see if it's operating. If not, check all breakers to it. Can you see any ice accumulated on the outdoor unit? If it is running and not producing heat, turn the tstat to emergency/auxiliary heat. and the heat pump turned off to prevent damage. You'll need a service tech.

Nov 04, 2017 | Heating & Cooling

1 Answer


Wire tstat normaly> Take the Y off the tstat and it goes to the outside unit. The other wire from the outside init goes to the common off the transformer. This is marked with blue,brown or black. Russ

Jul 23, 2009 | Goodman Heating & Cooling

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Inside blower not starting every time

You have a voltage bleed somewhere or a short, whatever you want to call it. Do you have a control board on this unit where the relays are integrated into it or do you have the old type where the relay is separate? Anyway, you need to take a meter and take voltage readings to the motor when it's acting up and when it's running right. I have had the same problem with a Goodman unit before and it turned out to be the tstat! What I would do is remove the cover off the tstat and take a small jumper wire and touch the r terminal to the y terminal. If the motor starts right up, you know it's the tstat. If you have the same problem, then the only thing it can be is a low voltage short to the unit from the tstat, bad control board if you have one, or a bad relay. But if the unit is working fine in heat, it's probably not the relay. I hope this helps.

Apr 08, 2009 | Goodman Heating & Cooling

1 Answer

I have a Rudd ubha and have been using the emergency heat for a couple weeks because the aux. heat won't work. Now I need the A.C. but the unit outside won't turn on. We replaced the control panal and it...

Did you replace the defrost board out in the outside unit? Or did you replace the control board just on the airhandler? You need to check if the board outside is functioning. Also, put the unit in cool and check to see if the outside unit is being called to come on. What could of happened is the unit was the compressor went out and that's why it didn't work in Aux. and only in emergency. I would just recommend checking the outside for issues since the inside unit is operating in emer. It could possibly be the tstat also. Just buy a tstat for a heat pump and follow the instructions. The key is to label your wires with what color is going to what terminal (r,w,g,o,y etc...) and then use the new tstat instructions. Better yet, buy the same brand t-stat. Hope this helps.

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We recently bought a new house (to us). It has a Goodman heat pump and Goodman Electric backup furnace(A36-15) with a Janitrol stat. I switched the stat to emrg. Heat when the temp got below...

If you have a volt meter, check to see if you have 24 volts coming from the thermostat on the yellow wire.

If you do, and it is set on emer heat, you have a bad T-stat.

It looks like it is wired properly.

If you have no meter, you could try changing the stat, I reccomend Honeywell or white rodgers.

Let me know if you eliminate the Tstat as the problem and we can go from there.
Chances are its the stat.

Dec 06, 2008 | Heating & Cooling

1 Answer

Ruud heat pump high pressure cut off problem

That's going to be in your installer configuration. Check and make sure the G terminal has a wire connected to it at the tstat , and that connection it tight. In the configuration menu, make sure it is set for a heat pump, elected heat. It seems to me that the tstat doesn't know its connected to a heat pump. Should be able to locate aodel # for tstat on the back of it. And ask Mr. Google for a manual, if you don't have 1. Hope this helps!

Mar 18, 2017 | Heating & Cooling

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